{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["protein", "RNA", "DNA", "cell type", "cell line"], "input": "In U-937 cells , optimum time and dose of pretreatment with 1,25-(OH)2D3 were determined to be 12-24 h at a receptor saturating concentration of 1,25-(OH)2D3 (10 nM)."}
{"protein": [], "RNA": [], "DNA": [], "cell type": [], "cell line": ["U-937", "U-937 cells"]}